We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
"Junior was totally on top of things. Installers were on time, polite and very efficient. I was given 5 quotes from other companies but General Air Technology was BY FAR the lowest quote."
nadine D on January 2022
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
"Junior was totally on top of things. Installers were on time, polite and very efficient. I was given 5 quotes from other companies but General Air Technology was BY FAR the lowest quote."
nadine D on January 2022
At COMFORT ENERGY, we are a full service team of licensed, highly trained and experienced professional installers and service technicians able to address every need of your commercial and residential heating and cooling needs. With more than 30 years of experience in the field, our staff is able to address everything from a simple service issue to complex integrated systems.
"They sent over a knowledgeable technician who was polite and professional. He was able to diagnose exactly what the problem was and fix it. "
Madhu V on June 2025
At COMFORT ENERGY, we are a full service team of licensed, highly trained and experienced professional installers and service technicians able to address every need of your commercial and residential heating and cooling needs. With more than 30 years of experience in the field, our staff is able to address everything from a simple service issue to complex integrated systems.
"They sent over a knowledgeable technician who was polite and professional. He was able to diagnose exactly what the problem was and fix it. "
Madhu V on June 2025
Welcome to ALANIS AIR, a family-owned and operated, top performing, highly rated HVAC company. We started 10 years ago in San Diego. Thanks to our unwavering dedication to quality and customer satisfaction, we're now serving the SF Bay Area and surrounding areas with one mission: to provide unparalleled comfort and care to every home we serve. We are offering the BEST deals in the industry in order to grow our business and demonstrate our excellence in service. At Alanis Air, we understand that your home is your sanctuary, and our goal is to ensure it remains a haven of comfort throughout every season. When you choose Alanis Air, you're not only selecting a service provider; you're inviting a trusted partner into your home. We take time to listen to your needs, so we can deliver solutions that fit your budget and lifestyle. If you're looking for TOP QUALITY work at a GREAT PRICE, Alanis Air will exceed your expectations! ALANIS AIR? Where Comfort Meets Care, Every Step of the Way.
"Alanis Air did a great job with my HVAC project. John Alanis answered all my questions and worked with me in deciding which system I should choose when replacing my very old system. His crew completed the work in one day, cleaned up the area and disposed of my old system. They were very efficient, knowledgeable and friendly. I would recommend Alanis Air for any of your HVAC needs! Thank you John, Santiago, Angel and Ismael :-)"
Amy F on May 2025
Welcome to ALANIS AIR, a family-owned and operated, top performing, highly rated HVAC company. We started 10 years ago in San Diego. Thanks to our unwavering dedication to quality and customer satisfaction, we're now serving the SF Bay Area and surrounding areas with one mission: to provide unparalleled comfort and care to every home we serve. We are offering the BEST deals in the industry in order to grow our business and demonstrate our excellence in service. At Alanis Air, we understand that your home is your sanctuary, and our goal is to ensure it remains a haven of comfort throughout every season. When you choose Alanis Air, you're not only selecting a service provider; you're inviting a trusted partner into your home. We take time to listen to your needs, so we can deliver solutions that fit your budget and lifestyle. If you're looking for TOP QUALITY work at a GREAT PRICE, Alanis Air will exceed your expectations! ALANIS AIR? Where Comfort Meets Care, Every Step of the Way.
"Alanis Air did a great job with my HVAC project. John Alanis answered all my questions and worked with me in deciding which system I should choose when replacing my very old system. His crew completed the work in one day, cleaned up the area and disposed of my old system. They were very efficient, knowledgeable and friendly. I would recommend Alanis Air for any of your HVAC needs! Thank you John, Santiago, Angel and Ismael :-)"
Amy F on May 2025
At Bell Brothers, our number priority to keep our customer, employees, and their families safe. As we continue to closely monitor the coronavirus situation, we want you to know that we have taken steps to ensure we are serving you in the safest way possible. As a precautionary measure, to ensure we are doing everything we can to ensure a safe and healthy work environment, we have implemented increased hygiene routines. This includes increased cleaning and sanitizing of all offices and high contact areas. All technicians will be taking precautionary measures such as: -Wearing gloves -Limiting contact such as handshaking -Hand washing and sanitizing before and after each customer visit -Wearing a mask on their face We will be doing everything we can to keep you and our technicians safe. Thank you for your trust in Bell Brothers. We remain committed to safely serving you.
"sometimes it takes time to complete the work"
Jayant S on August 2024
At Bell Brothers, our number priority to keep our customer, employees, and their families safe. As we continue to closely monitor the coronavirus situation, we want you to know that we have taken steps to ensure we are serving you in the safest way possible. As a precautionary measure, to ensure we are doing everything we can to ensure a safe and healthy work environment, we have implemented increased hygiene routines. This includes increased cleaning and sanitizing of all offices and high contact areas. All technicians will be taking precautionary measures such as: -Wearing gloves -Limiting contact such as handshaking -Hand washing and sanitizing before and after each customer visit -Wearing a mask on their face We will be doing everything we can to keep you and our technicians safe. Thank you for your trust in Bell Brothers. We remain committed to safely serving you.
"sometimes it takes time to complete the work"
Jayant S on August 2024
Welcome to CaliforniAir Heating & Air Conditioning. We proudly service San Jose and the surrounding areas. Our goal is to complete your project to perfection. We look forward to building long lasting relationships with the customers that we serve. We look forward to serving you. Call us today! You will not be disappointed.
"Trouble shot the problem and procured the parts necessary to repair the a/c."
Patrick S on May 2024
Welcome to CaliforniAir Heating & Air Conditioning. We proudly service San Jose and the surrounding areas. Our goal is to complete your project to perfection. We look forward to building long lasting relationships with the customers that we serve. We look forward to serving you. Call us today! You will not be disappointed.
"Trouble shot the problem and procured the parts necessary to repair the a/c."
Patrick S on May 2024
Look no further than Aire Serv® when you need high-quality Santa Clara County, CA, heating and air conditioning services. We have been providing top-tier HVAC services throughout North America since 1992. At Aire Serv of Campbell & Saratoga, our HVAC experts pride themselves on consistently delivering outstanding service to all our commercial and residential customers. Of course, heating and cooling best practices have evolved over time, and Campbell & Saratoga HVAC services must reflect those changes. Our service professionals have the knowledge and experience necessary to maintain and repair modern and older units alike. Regardless of whether your heating unit is malfunctioning or you’re in the market for a new system altogether, our Campbell & Saratoga heating service experts are ready to help. And when temperatures climb, you can count on our Campbell & Saratoga air conditioning service professionals to bring their expertise to your home or business.
"I recently had a new HVAC system installed by Aireserv, and I couldn't be more pleased with the results. From the beginning, the team was professional, courteous, and informative. They arrived on time and were very thorough in explaining the detailed installation plan, the features of the new system, and how to operate it. The installation went smoothly, and the technicians cleaned the area while working. Once the system was installed, they ran tests to ensure everything was working perfectly and took the time to answer all of my questions. The new HVAC system has been a game-changer in terms of performance. It heats and cools my home more efficiently than my previous unit, and I've noticed a significant improvement in comfort and air quality. The system runs quietly and maintains an even temperature throughout my home. I also appreciate the energy savings I'm already seeing. My energy bills have been noticeably lower, which I can directly attribute to the new system's efficiency."
Azam M on January 2025
Look no further than Aire Serv® when you need high-quality Santa Clara County, CA, heating and air conditioning services. We have been providing top-tier HVAC services throughout North America since 1992. At Aire Serv of Campbell & Saratoga, our HVAC experts pride themselves on consistently delivering outstanding service to all our commercial and residential customers. Of course, heating and cooling best practices have evolved over time, and Campbell & Saratoga HVAC services must reflect those changes. Our service professionals have the knowledge and experience necessary to maintain and repair modern and older units alike. Regardless of whether your heating unit is malfunctioning or you’re in the market for a new system altogether, our Campbell & Saratoga heating service experts are ready to help. And when temperatures climb, you can count on our Campbell & Saratoga air conditioning service professionals to bring their expertise to your home or business.
"I recently had a new HVAC system installed by Aireserv, and I couldn't be more pleased with the results. From the beginning, the team was professional, courteous, and informative. They arrived on time and were very thorough in explaining the detailed installation plan, the features of the new system, and how to operate it. The installation went smoothly, and the technicians cleaned the area while working. Once the system was installed, they ran tests to ensure everything was working perfectly and took the time to answer all of my questions. The new HVAC system has been a game-changer in terms of performance. It heats and cools my home more efficiently than my previous unit, and I've noticed a significant improvement in comfort and air quality. The system runs quietly and maintains an even temperature throughout my home. I also appreciate the energy savings I'm already seeing. My energy bills have been noticeably lower, which I can directly attribute to the new system's efficiency."
Azam M on January 2025
Message from the Owner/ Founder: “As a third generation heating and air technician and retired 20 year veteran of fire and public safety, I wanted to create a service company that you could count on for its integrity and professionalism. When our service technicians arrive at your home, we want you to feel the same level of confidence and trust you get from a firefighter arriving at your home to help when you call 911. Our service technicians are professional, courteous, and well trained. I am comfortable allowing them into the homes of my families and friends who are firefighters, police officers and the public. Thank you for the opportunity to service your comfort needs and believing in our company. We look forward to a continued long relationship. Warm regards, Harry Abbott” Comfort Energy Inc is a full service provider of quality air conditioning and heating repair and installation. . Locally owned and operated, with over 30 years of experience. We are proud members of the Nexstar network of contractors. We specialize in helping homeowners make informed decisions to best meet your family's comfort needs. Spanish and Japanese spoken.
"We had a wonderful experience with Comfort Energy! The service person, whose name was Chance, did a thorough evaluation of the problem with a focus on saving us as much money as possible, to either repair or replace our 30-year-old heat furnace. He quickly determined that our inlet filter was too dense (it was a Merv 11 and should have been a Merv 8) and that that was probably causing the heater to go off an on every 5-10 minutes. He then tested and confirmed his hypothesis. He also performed a CO test to make sure there wasn't anything more serious going on. Finally, he gave us a good idea of replacement options, which we should probably do before the next Winter, but not necessarily right away. All in all, this is exactly the kind of assessment we needed, and it cost orders of magnitude less than what was estimated by the first service company we had come out. Chance was great, and Comfort Energy is our go-to for heating and cooling service and/or installation from now on."
Gary S on April 2025
Message from the Owner/ Founder: “As a third generation heating and air technician and retired 20 year veteran of fire and public safety, I wanted to create a service company that you could count on for its integrity and professionalism. When our service technicians arrive at your home, we want you to feel the same level of confidence and trust you get from a firefighter arriving at your home to help when you call 911. Our service technicians are professional, courteous, and well trained. I am comfortable allowing them into the homes of my families and friends who are firefighters, police officers and the public. Thank you for the opportunity to service your comfort needs and believing in our company. We look forward to a continued long relationship. Warm regards, Harry Abbott” Comfort Energy Inc is a full service provider of quality air conditioning and heating repair and installation. . Locally owned and operated, with over 30 years of experience. We are proud members of the Nexstar network of contractors. We specialize in helping homeowners make informed decisions to best meet your family's comfort needs. Spanish and Japanese spoken.
"We had a wonderful experience with Comfort Energy! The service person, whose name was Chance, did a thorough evaluation of the problem with a focus on saving us as much money as possible, to either repair or replace our 30-year-old heat furnace. He quickly determined that our inlet filter was too dense (it was a Merv 11 and should have been a Merv 8) and that that was probably causing the heater to go off an on every 5-10 minutes. He then tested and confirmed his hypothesis. He also performed a CO test to make sure there wasn't anything more serious going on. Finally, he gave us a good idea of replacement options, which we should probably do before the next Winter, but not necessarily right away. All in all, this is exactly the kind of assessment we needed, and it cost orders of magnitude less than what was estimated by the first service company we had come out. Chance was great, and Comfort Energy is our go-to for heating and cooling service and/or installation from now on."
Gary S on April 2025
We are proud to offer fast, friendly, affordable and reliable service and installation for both residential and commercial equipment. We have the extensive experience and expertise to troubleshoot a wide range of equipment. Air Conditioning and Heating: We provide installation, repair, and replacement services for all brands of air conditioners, gas and heat pump systems, for both residential and commercial customers. Refrigeration We provide installation, repair, and replacement services for all refrigeration brands, both residential & commercial, including: wine cellars, walk-in boxes, produce coolers, ice machines, reach-in coolers, beverage coolers, and more. Maintenance We provide air balancing, efficiency testing, and required maintenance of refrigeration, gas, A/C, and heat pump systems for residential and commercial customers. Annual Inspections We inspect electrical disconnect boxes and test capacitors for proper rating and safety, inspect condenser coils and remove debris, and monitor refrigerant for proper operating pressures. Pre-Season Inspection We inspect both indoor and condenser coils, clean or replace existing air filters as needed, as well as test thermostats for proper operation.
"Good diagnosis and remedy."
Eugene C on April 2023
We are proud to offer fast, friendly, affordable and reliable service and installation for both residential and commercial equipment. We have the extensive experience and expertise to troubleshoot a wide range of equipment. Air Conditioning and Heating: We provide installation, repair, and replacement services for all brands of air conditioners, gas and heat pump systems, for both residential and commercial customers. Refrigeration We provide installation, repair, and replacement services for all refrigeration brands, both residential & commercial, including: wine cellars, walk-in boxes, produce coolers, ice machines, reach-in coolers, beverage coolers, and more. Maintenance We provide air balancing, efficiency testing, and required maintenance of refrigeration, gas, A/C, and heat pump systems for residential and commercial customers. Annual Inspections We inspect electrical disconnect boxes and test capacitors for proper rating and safety, inspect condenser coils and remove debris, and monitor refrigerant for proper operating pressures. Pre-Season Inspection We inspect both indoor and condenser coils, clean or replace existing air filters as needed, as well as test thermostats for proper operation.
"Good diagnosis and remedy."
Eugene C on April 2023
Dukes Heating & Air Conditioning is in HVAC business for 37 years now and continuously remains on the top of the industry. We do this by providing honesty and good workmanship that our customers love the most. We- Dukes Heating & Air Conditioning , also make sure that we have the latest technology that enables us to be more competitive & expert in the field and stand behind any work we have performed. Our in-house employees are all professionally trained and deliver only excellence to whatever project they work on.
"Great service"
Noah H on October 2023
Dukes Heating & Air Conditioning is in HVAC business for 37 years now and continuously remains on the top of the industry. We do this by providing honesty and good workmanship that our customers love the most. We- Dukes Heating & Air Conditioning , also make sure that we have the latest technology that enables us to be more competitive & expert in the field and stand behind any work we have performed. Our in-house employees are all professionally trained and deliver only excellence to whatever project they work on.
"Great service"
Noah H on October 2023
We are locally owned and operated, and serving the Bay Area. Our focus is residential air conditioning, heating, Installation of HVAC systems and full-service plumbing. We love working with homeowners and helping to take care of their precious homes. We also keep busy doing light commercial service. Serving California since 1954, financing options available, We don't charge extra for Saturday service calls.
"Called this company for their $77 dollar, which they advertised with a flyer, for a tune-up and cleaning for my heating system. They are a Hayward company and I was told that our Castro Valley home was not in their service area. I bet if I called to buy a new heater they would be out in a day."
Gregory O on March 2023
We are locally owned and operated, and serving the Bay Area. Our focus is residential air conditioning, heating, Installation of HVAC systems and full-service plumbing. We love working with homeowners and helping to take care of their precious homes. We also keep busy doing light commercial service. Serving California since 1954, financing options available, We don't charge extra for Saturday service calls.
"Called this company for their $77 dollar, which they advertised with a flyer, for a tune-up and cleaning for my heating system. They are a Hayward company and I was told that our Castro Valley home was not in their service area. I bet if I called to buy a new heater they would be out in a day."
Gregory O on March 2023
Heat pumps rely on evaporation and condensation processes. The unit transfers heat through the system via a compressed refrigerant. The compressor within the pump circulates the refrigerant through two coils. The first coil evaporates the refrigerant and absorbs warmth from the air. The refrigerant then passes to the second coil, where it condenses, and the unit releases the absorbed heat.
A well-installed and well-maintained heat pump lasts an average of 12 to 20 years. Routine filter changes, annual tune‑ups, and prompt repairs help the equipment reach the upper end of that range, while skipped maintenance or poor installation can shorten its life and raise long‑term costs. Ask your heat pump installation pro for maintenance recommendations so you can get the maximum benefit from your unit.
Heat pumps are most effective in regions where winter lows remain above approximately 40°F. Efficiency starts to drop below that point and falls off sharply near 25°F. If you live in a colder area, look for a model with a high Heating Seasonal Performance Factor (HSPF) and plan on supplemental heat during deep freezes to keep energy use in check.
The biggest drawbacks are the upfront cost and poor cold-weather performance. Installation can require electrical upgrades or duct changes, and once temperatures fall well below freezing, the unit may need help from a furnace or electric resistance coils. Factor in those add‑ons, along with routine maintenance, when you weigh the long‑term savings against the initial investment.